Facile fabrication of poly(vinyl alcohol) gels and derivative aerogels |
| |
Authors: | Hong-Bing Chen Erin Hollinger Yu-Zhong Wang David A. Schiraldi |
| |
Affiliation: | 1. Center for Degradable and Flame-Retardant Polymeric Materials, College of Chemistry, State Key Laboratory of Polymeric Materials Engineering, Sichuan University, Chengdu 610064, China;2. Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, OH 44106-7202, USA |
| |
Abstract: | A facile preparation of poly(vinyl alcohol) (PVOH) hydrogels and their derivative PVOH/montmorillonite clay aerogels is reported, using water as solvent and divinylsulfone as crosslinking agent, making use of an environmentally friendly freeze drying process. The materials exhibit significantly increased mechanical properties after crosslinking. The compressive modulus of an aerogel prepared from an aqueous suspension containing 2 wt% PVOH/8 wt% clay increased 29-fold upon crosslinking, for example. Crosslinking of the polymer/clay aerogels decreased the onset decomposition temperature as measured by thermogravimetric analysis, and generated a more continuous structure at higher clay contents. Such polymer/clay aerogels are promising materials for low flammability applications. |
| |
Keywords: | Poly(vinyl alcohol) Hydrogel Aerogel |
本文献已被 ScienceDirect 等数据库收录! |
|